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R. Stine. Monster Blood IV

It’s Four Times As Evil! Evan Ross can’t forget about Monster Blood — the evil green slime that never stops growing. It can turn ordinary pets into ferocious animals and twelve-year-old kids into freakish giants.But now there’s a new kind of Monster Blood in town. It comes in a can just like the others. Only difference is this slime is blue instead of green. And instead of just growing, it’s multiplying — into terrifying blue creatures with razor-sharp teeth….